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《Journal of Lanzhou University(Natural Sciences)》 2019-01
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Analysis of ecological environment changes from 2000 to 2015 in Qingyang, Gansu Province

Du Ting;Jiao Ji-zong;Xie Yao-wen;Lu Hui;College of Earth and Environmental Sciences, Lanzhou University;  
Taking the 1∶100 000 land use data of 2000, 2010 and 2015, multi-source remote sensing data and related statistical data as data sources, referencing to the "Technical Criterion for Ecosystem Status Evaluation" and selecting the biological richness index, vegetation coverage index, water network denseness index and land stress index, the ecological environmental condition of Qingyang was evaluated and the results showed that the biological richness index of Qingyang was basically unchanged from2000 to 2015, the vegetation coverage index and water network denseness increased continuously and the land stress index was decreasing. In the past 15 years, the overall ecological environment of Qingyang was at a "general" level, but the value of the ecological index(EI) increased significantly during the period, showing a steady change for a better trend. The level of ecological environment of Ningxian and Zhengning counties changed from "general" to "good", while other counties stayed on the "general" level,and the value of EI had an increasing trend.
【Fund】: 国家自然科学基金项目(41530752)
【CateGory Index】: X32
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